The bradycardial response to the diving reflex, which occurs in man and in diving animals, is thought to be a physiologically protective oxygen-conserving mechanism whereby the animal is kept alive during submergence.

The cholesterol-lowering effect of clofibrate (Ciba-SU13437) cholestyramine and the combination of clofibrate and cholestyramine is studied in 19 subjects with type IIa hyperlipoproteinaemia, over a 20-week period.